He constantly needs your reassurance that you do actually really love him. You yourself somewhat can compare to him. So him needing your reassurance makes you assured. You typically find this extremely cute too.

While reading 'White Nights', feeling the hatred tords Nastenka, you feel a pair of arms wrapped around you.

Nikolai was flopped on you, taking you in a tight embrace.

"Do you love me? " He mumbled into your chest